Geoffroy's spider monkey (ateles geoffroyi), also known as black-handed spider monkey. It is one of four species of monkeys that can be found in Costa Rica. Its arms are significantly longer than its legs, and its prehensile tail can support the entire weight of the monkey and is used as an extra limb.
, Stefan Cruysberghs, Nikon D600 + Sigma 50-500mm, Request high resolution photo